/*  
 *  Copyright 2006 Paul Jack.
 *
 *  This file is part of the Dex compiler suite. 
 *  
 *  Dex is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the
 *  Free Software Foundation; either version 2 of the License, or (at your
 *  option) any later version.
 *  
 *  Dex is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 *  Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
package dex.compiler.interpreter.value;


import dex.compiler.checker.type.NullType;
import dex.compiler.checker.type.Type;


/**
 * The <code>null</code> value.
 */
public class NullValue extends ReferenceValue {


	/**
	 * The singleton instance.
	 */
	final public static NullValue INSTANCE = new NullValue();


	/**
	 * Private to enforce the singleton pattern.
	 */
	private NullValue() {
	}


	@Override
	public String toString() {
		return "null";
	}


	@Override
	public Type type() {
		return NullType.INSTANCE;
	}

}
